how can I save a CLOB in a BLOB

I have two tables between which i have to move data. The first table
has the data in a CLOB, and the second table has a column that is a
BLOB. A normal insert into statement i tried failed and i got the error
message

ORA-00932: inconsistent datatypes

Is there a way I can convert the CLOB into a BLOB and then insert the
data ? This is on Oracle 8i.